In Argentina, autumn signifies the end of the high summer temperatures and the start of cooler weather, along with the changing colors of tree leaves. This seasonal transition is tied to an astronomical event known as the equinox, which occurs when the sun's rays strike the equator perpendicularly, resulting in equal day and night lengths. Many people in Argentina often inquire about the exact date when autumn begins, especially during the warmer summer months.

According to data from the Servicio de Hidrografía Naval (SHN), the equinox for autumn 2026 will occur on March 20 at 11:46 AM. This precise time marks an important moment in the Southern Hemisphere, where the climate shifts significantly as the days grow shorter and temperatures decrease. As traditional in various cultures, autumn is often associated with harvests and preparations for the winter.

Understanding these seasonal changes is critical not just for agriculture and environmental awareness but also for the cultural significance attached to the year's cycles. The transition to autumn symbolizes renewal and change, providing communities with an opportunity to engage in seasonal festivities and appreciate the natural transformation that occurs around them.